How to Create Services in Android : Services demo in Android : Service Example : Background Services

Hello friends,
      Today I am going to share my R & D on Services in Android. A Service is a component that can run in the background for an arbitrary amount of time. As with the activity tag, you can optionally include one or more <intent-filter> elements that the service supports or <meta-data> values; see the activity's <intent-filter> and <meta-data> descriptions for more information.

Services Life cycle is totally differences to Activity life cycle. Copy below given code and test it yourself-

Screen Shot:

1)Create new android demo project.
2)Create MyService.java class.
3)Create  ServiceDemo.java activity.
4)And for testing Create a new activity NextPage.java
5)Create a raw folder inside your res folder and put a .mp3 file/song into raw folder.
6)Create main.xml
7)Create next.xml
8)Add Services in manifest.xml-

 <service
            android:name=".MyService"
            android:enabled="true" />

My Code-

1)Myservice.java

package com.example.seevicedemoaudioplayer;

import android.app.Service;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.IBinder;
import android.util.Log;
import android.widget.Toast;

public class MyService extends Service {
private static final String TAG = "My Service Demo";
MediaPlayer myPlayer;

@Override
public IBinder onBind(Intent intent) {
return null;
}

@Override
public void onCreate() {
Toast.makeText(this, "My Service Created", Toast.LENGTH_LONG).show();
Log.d(TAG, "onCreate");

myPlayer = MediaPlayer.create(this, R.raw.loveme);
myPlayer.setLooping(false); // Set looping
}

@Override
public void onDestroy() {
Toast.makeText(this, "My Service Stopped", Toast.LENGTH_LONG).show();
Log.d(TAG, "onDestroy");
myPlayer.stop();
}

@Override
public void onStart(Intent intent, int startid) {
Toast.makeText(this, "My Service Started", Toast.LENGTH_LONG).show();
Log.d(TAG, "onStart");
myPlayer.start();
}
}

2)ServicesDemo.java

package com.example.seevicedemoaudioplayer;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class ServicesDemo extends Activity implements OnClickListener {
private static final String TAG = "ServicesDemo";
Button buttonStart, buttonStop,buttonNext;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

buttonStart = (Button) findViewById(R.id.buttonStart);
buttonStop = (Button) findViewById(R.id.buttonStop);
buttonNext = (Button) findViewById(R.id.buttonNext);

buttonStart.setOnClickListener(this);
buttonStop.setOnClickListener(this);
buttonNext.setOnClickListener(this);
}

public void onClick(View src) {
switch (src.getId()) {
case R.id.buttonStart:
Log.d(TAG, "onClick: starting srvice");
startService(new Intent(this, MyService.class));
break;
case R.id.buttonStop:
Log.d(TAG, "onClick: stopping srvice");
stopService(new Intent(this, MyService.class));
break;
case R.id.buttonNext:
Log.d(TAG, "onClick: next Page");
Intent intent=new Intent(this,NextPage.class);
startActivity(intent);
break;
}
}
}

3)NextPage.java

package com.example.seevicedemoaudioplayer;

import android.app.Activity;
import android.os.Bundle;

public class NextPage extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.next);

}
}

4)main.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:background="#000000"

    android:gravity="center"

    android:orientation="vertical" >

    <TextView

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:gravity="center"

        android:padding="20dp"

        android:text="Services Demo"

        android:textColor="#ffffff"

        android:textSize="20sp" />

    <Button

        android:id="@+id/buttonStart"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="Start" >

    </Button>

    <Button

        android:id="@+id/buttonStop"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="Stop" >

    </Button>

    <Button

        android:id="@+id/buttonNext"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="Next Page" >

    </Button>

</LinearLayout>

5)next.xml

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:background="#000000"

    android:orientation="vertical" >

    <TextView

        android:id="@+id/textView1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_alignParentTop="true"

        android:layout_centerHorizontal="true"

        android:layout_marginTop="169dp"

        android:text="Welcome- Second page"

        android:textAppearance="?android:attr/textAppearanceLarge"

        android:textColor="#ffffff" />

</RelativeLayout>

7)AndroidManifest.xml

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.example.seevicedemoaudioplayer"

    android:versionCode="1"

    android:versionName="1.0" >

    <uses-sdk

        android:minSdkVersion="8"

        android:targetSdkVersion="15" />

    <application

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name"

        android:theme="@style/AppTheme" >

        <activity

            android:name=".ServicesDemo"

            android:label="@string/title_activity_service_demo" >

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

        <service

            android:name=".MyService"

            android:enabled="true" />

         <activity

            android:name=".NextPage"/>

    </application>

</manifest>

8)Most Important Create raw folder inside res and put a .mp3 file like-loveme.mp3

Download Zip Code

Thank you so much!

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